Bump build-depends of debhelper for overrides support.

debian/changelog

@@ -7,6 +7,7 @@ lubuntu-default-settings (0.22) UNRELEASED; urgency=low
   * debian/control:
    - add depends on lightdm-gtk-greeter >= 1.0.0-0ubuntu2.
    - provides lightdm-gtk-greeter-config.
+   - Bump build-depends of debhelper for overrides support.
   * debian/source/format:
    - Switch to format 3.0 (native).
   * debian/rules:

debian/control

@@ -2,7 +2,7 @@ Source: lubuntu-default-settings
 Section: x11
 Priority: optional
 Maintainer: Julien Lavergne <gilir@ubuntu.com>
-Build-Depends: debhelper (>= 7), 
+Build-Depends: debhelper (>= 7.0.50~), 
                intltool
 Standards-Version: 3.8.3
 Homepage: https://launchpad.net/~lubuntu-desktop